Design and Control of Diphenyl Carbonate Reactive Distillation Process

• Main Authors: Lin-Chun Yang, 楊麟鈞
• Other Authors: Yi-Shyong Chou
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/5tcqmf

碩士 === 國立臺灣科技大學 === 化學工程系 === 99 === This research studied about design and control of diphenyl carbonate (DPC) reactive distillation process. Diphenyl carbonate is a precursor in the production of polycarbonate (PC). DPC is considered as a substitution for phosgene to synthesize PC. Due to the phosgen-base process have many drawbacks. At first, suitable thermodynamic and kinetic model are chosen to describe this process, and perform the steady-state simulation by Aspen Plus. In the research, the optimum process design flowsheet is obtained by minimizing the Total Annual Cost (TAC) of this process. After the optimum design of Reactive Distillation Column, Pre- Distillation Column, and Extractive Distillation System are obtained. We connect each unit into a plant-wide process, and recover the un-reacted reactants and entrainer to the process. We also changing some inter specifications to find the optimum process. After that, the research do the dynamic simulation and control by Aspen Dynamic. A simple control strategy has been proposed, and the sensitivity analysis is performed to find the suitable control point of each unit. The proposed control strategy works effectively to hold the product compositions despite feed flow rate and feed composition changes. A set-point temperature adjustment scheme is proposed to maintain the purity of product composition when throughput change .